# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from mcp-security.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Performs live reconnaissance on a domain by resolving its IPv4/IPv6 DNS records, inspecting TLS certificate issuer and expiry, and grading its HTTP security headers.

## Facts

- Endpoint: GET https://mcp-security.agentdiet.dev/v1/tls-scanner?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: mcp-security.agentdiet.dev
- Website: https://mcp-security.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mcp-security-agentdiet-dev-domain-osint-tls-certificate-security-3f44b15f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XSZ4v3PGmgUkJMSlZnXUV

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability mcp-security-agentdiet-dev-domain-osint-tls-certificate-security-3f44b15f
```

Example prompt: Can you run a full TLS and security headers recon on anthropic.com — I want to see the certificate issuer, expiry date, DNS records, and what security grade the HTTP headers get?

## When to prefer this

Choose this endpoint when you need a quick, all-in-one passive reconnaissance snapshot of a domain covering DNS, TLS certificate validity, and HTTP security headers in a single call. It is ideal for pre-deployment audits, vendor security assessments, or lightweight OSINT without setting up a full security scanning pipeline. Prefer it over dedicated DNS or SSL tools when you want a combined security posture overview rather than deep protocol-layer analysis.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain has no TLS certificate (HTTP-only) — TLS fields may be null or an error is returned
- Domain is unreachable or times out — connection timeout error
- Malformed or missing domain parameter — 400 Bad Request
- Payment not provided or insufficient — 402 Payment Required

## How this service works

Inspects live IPv4/IPv6 DNS resolution, TLS certificate issuer/expiry, and HTTP security grade. (Live x402 v2, IETF MPP & MCP endpoint at https://mcp-security.agentdiet.dev/v1/tls-scanner)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security headers assessment including presence/absence of headers like HSTS, CSP, X-Frame-Options, and an overall security grade.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "domain"
 ],
 "properties": {
  "domain": {
   "type": "string",
   "minLength": 1,
   "description": "Target domain name (e.g. anthropic.com, openai.com) for DNS, TLS certificate, and security header OSINT"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mcp-security-agentdiet-dev-domain-osint-tls-certificate-security-3f44b15f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-security.agentdiet.dev](https://www.zero.xyz/host/mcp-security.agentdiet.dev/llms.txt)